초 록
보리흰가루병(Erysiphe graminis hordei race I)에 의한 대맥엽침입부에 항균성 형광화세포를 유도하는 물질의 추출분획을 얻기 위하여 실험을 실시한 결과 분생포자의 ethanol 추출분획이 형광화세포의 유도활성을 가지고 있음이 밝혀졌다. 이 분획은 비친화성인 Turkey 290품종에나 친화성품종에나 마찬가지로 형광화세포 유도활성을 나타냈으나 그 유도에 요하는 시간은 Turkey 290에서 8시간 이내 Kobingataki에서 16시간이내이었다.
To suggest the development possibility of immunostimulating materials from lactic acid bacteria (LAB) postbiotics, Lactobacillus sakei/Leuconostoc mesenteroides were isolated from Kimchi. Next, two isolated LAB were cultured to prepare postbiotics (LABP) to measure macrophage activity. LABP significantly increased the production of macrophage stimulating factors such as nitric oxide, tumor necrosis factor-α, and interleukin-6. LABP-crude polysaccharides (CP) fractionated from LABP by EtOH precipitation not only showed more potent macrophage stimulating activity but also induced phagocytic activity in a dose-dependent manner. In addition, LABP-CP was identified as polysaccharides with a major monosaccharide composition of mannose (59.1%), glucose (23.0%), and galactose (14.0%) with high-molecular-weight of 103.5~126.7 kDa. In conclusion, postbiotics prepared from LAB isolated from Kimchi were confirmed to have industrial applications as a functional material with immunostimulating activity.
This research focused on the isolation and characterization of the new strains which can be used as microbial resources for auxin production in the agriculture industry. For the isolation of the new microorganism in the gut of Larimichthys polyactis, a marine agar medium was used and 3 colonies were isolated. Through the 16S-based ID service, isolated strains were identified as 1 strain of Niallia circulans and 3 strains of Proteus mirabilis. Verifying the agriculture industrial values of these isolated strains, the productivity of auxin and activity of various enzymes such as amylase, lipase, and protease were confirmed. As a result, isolated 3 strains showed auxin activity and only protease activities which means the possibility of applying them to the production of effective microorganisms in the agriculture industry.